CPC Subgroup
G01B 9/021 using holographic techniques
Full Title
Measuring instruments characterised by the use of optical techniques > Interferometers > using holographic techniques
4 direct subcodes
Child Classifications
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- G01B 9/023 for contour producing (G01B9/025 - G01B9/029 take precedence)
- G01B 9/025 Double exposure technique
- G01B 9/027 in real time
- G01B 9/029 by time averaging